Switching LPV control design for magnetic bearing systems

Abstract

In this paper, a new LPV control design approach is proposed for magnetic bearing (AMB) systems. The motivation of gain-scheduled control for AMB is based on the fact that rotor dynamics have strong dependency on its rotating speed. However, previous study has shown that standard LPV control design was conservative due to large variations of rotor speed. The improvement of gain scheduled controller can be achieved from two aspects: introduce the bound for rotor variation rate into the control synthesis stage; design multiple LPV controllers over different operating ranges and provide a switching scheme for stability guarantee. These features will be demonstrated through a detailed AMB controller design example. This design procedure can also be extended to high-performance control of turbo-machinery problems.